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[SOLVED] Scrollbox Controlatpos
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Topic: [SOLVED] Scrollbox Controlatpos (Read 3678 times)
pcurtis
Hero Member
Posts: 951
[SOLVED] Scrollbox Controlatpos
«
on:
December 09, 2021, 04:03:57 am »
How do I get TScrollbox.Controlatpos to work? See attachment.
Code: Pascal
[Select]
[+]
[-]
procedure
TForm1
.
Button1Click
(
Sender
:
TObject
)
;
var
aPoint
:
TPoint
;
begin
aPoint
.
X
:
=
20
;
aPoint
.
Y
:
=
20
;
Caption
:
=
Scrollbox1
.
ControlAtPos
(
aPoint
,
True
)
.
ClassName
;
end
;
Gives a SIGSEGV
Test app attached
«
Last Edit: December 09, 2021, 09:42:55 am by pcurtis
»
Logged
Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
zeljko
Hero Member
Posts: 1596
Re: Scrollbox Controlatpos
«
Reply #1 on:
December 09, 2021, 09:33:00 am »
Maybe you should call ControlAtPos(aPoint, True).ClassName; like ControlAtPos(aPoint, True, True).ClassName; if your child controls are TWinControls. SIGSEGV is because result of ControlAtPos() is Nil.
Logged
pcurtis
Hero Member
Posts: 951
Re: Scrollbox Controlatpos
«
Reply #2 on:
December 09, 2021, 09:41:53 am »
Thanks. It works.
Logged
Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
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